Replacing battery in Shaver

[john west]

Am in the process of replacing a worn out battery in my Panasonic Shaver.

The battery is written on in Japanese and gives no indication of its capacity ( that i can see ). Its an AA size with protruding rods at each end.

I have put in the shaver a charged re-chargeable Duracell battery with aluminum foil stuffed in at both ends to make contact. since it does not have the battery inbuilt rods at each end.

The shaver does not work off the Duracell, neither does the charging light come on when charging it in the shaver.

Is there something special about their battery i wonder ?

[alan_m]

Is it a 1.5V battery or a 3.7V battery (18650 which is AA size)?

[alan_m]

My mistake - 14500 is the 3.7V AA size battery.

[Theo]

14500 is AA size, 18650 is bigger. Does it say Li-ion on the side? That's marked US14500V. Would something like this fit: you might need to fashion the tabs to attach to the shaver. (I can't find any with the 'rods' that match the above picture)

Theo

[Brian Gaff (Sofa]

Its probably a stack of cells in series with each other. Brian

[Brian Gaff (Sofa]

I think my first move on this would be to get hold of a variable psu and connect the leads the right way around, and gradually wind up the volts and see what it needs to make it sound like it should. Also are you definitely sure the charging circuit has not failed?

Brian

[alan_m]

A battery with two rods

Updated replacement???

[Harry Bloomfield Esq]

alan_m used his keyboard to write :

18650 is a similar diameter to AA, but a bit longer and as above 3.6v.

The higher voltage would explain the problem. Try Torchy for really good quality and genuine 18650 batteries. It is a very popular battery and there are lots of fakes around. Expect to pay around £11 for genuine items.

[alan_m]

It's probably equivalent to the 14500 which is AA size give or take

0.5mm in length. +1 about the number of fakes, well over specified (on the label_ batteries and just poor quality items that may only last a few discharges. However, some of the scammers sell at high prices to fool people into believing that they are selling higher quality items.

[The Natural Philosopher]

Only from russ adams - £5-£8 is the going rate

[newshound]

3.7 strongly suggests to me that it is Lithium Ion

[Dave Plowman (News]

What does the charger say about output, etc?

Most shavers I've seen run on rather more than 1.2v.

[Brian]

Google helps:

I?d measure the voltage of the old one as a guide to the type - NiMH, LiON etc, and go from there.